Unit 3: Maintaining Dynamic Equilibrium I

Many people believe that hookah smoking is safer than cigarette smoking. But in fact, hookah smoking can be even more harmful to your health!

Did you know that too much carbon dioxide in the classroom can affect your body, and even your grades?

Learn how e-cigarettes and other vaping products work, and why scientists and health professionals have concerns about their safety.

This backgrounder explains what light is, how it is measured, and how it affects people on Earth and astronauts on board the International Space Station.

Ethanol is a biofuel that can power a car. Learn about the enzymes, catalysts and processes like fermentation involved in ethanol production.

Learn how to measure lung capacity and about the factors that can affect our lung capacity in this hands on activity.

Snake venom can be dangerous for your circulatory system, nervous system or muscular system. But it can also be very useful in medicine.

Humidity is an important part of life on Earth and life in space. This backgrounder explains what humidity is, how it is measured and how it affects us both mentally and physically.

Make some fake snot and explore the function of mucus in this fun activity.

Get active in this activity and explore the impact of exercise on your heart rate. Ready, set, GO!

How do our bodies get cold? How do sleeping bags keep us warm?

Become a pro at washing dishes! Learn how the chemical structure of detergent makes it perfect for attracting grease and grime.

Everything and everyone ages. But scientists have made discoveries about our cells and circulatory and immune systems that could potentially one day be used to increase human lifespans.

Panic attacks are scary and they upset your body’s chemical equilibrium. Learn what happens to acids & bases in your circulatory system during a panic attack.

This backgrounder explains the different ways that cells repair damage to DNA.